body {
    background: url("../imagenes/logo.png") no-repeat scroll 0 0 #FFFFFF;
    font-family: Verdana, Arial, Helvetica;
    margin: 0px;
    color: #000000;
}

h1,h2,h3,h4 {
    color: slategrey;
    text-align:center;
    padding-top: 20px;
}

h2,h3,h4 {
    margin-top: 50px;
    border-width: 1px;
    border-color: silver;
}

img.center { 
    display: block; 
    margin-left: auto; 
    margin-right: auto;
    padding-top: 100px;
}
